define environment variables HOME and TERM

wlcg-wn/10-fixup_singularity.sh

+echo "sourcing 10-fixup_singularity.sh" > /tmp/condor_10-fixup_singularity.log
+echo "" >> /tmp/condor_10-fixup_singularity.log
+
+# Dirty hack for issue: https://github.com/sylabs/singularity/issues/1419
+if [ ! -e /dev/fd ]; then
+  echo "symbolic links NOT properly defined for the file descriptors" >> /tmp/condor_10-fixup_singularity.log
+  echo "now defined by 10-fixup_singularity.sh" >> /tmp/condor_10-fixup_singularity.log 
+  echo "" >> /tmp/condor_10-fixup_singularity.log
+  ln -s /proc/self/fd /dev/fd
+  ln -s /proc/self/fd/0 /dev/stdin
+  ln -s /proc/self/fd/1 /dev/stdout
+  ln -s /proc/self/fd/2 /dev/stderr
+else
+  echo "symbolic links properly defined for the file descriptors" >> /tmp/condor_10-fixup_singularity.log
+  echo "" >> /tmp/condor_10-fixup_singularity.log
+  echo "$(ls -la /dev | grep -E "fd|stdin|stdout|stderr")" >> /tmp/condor_10-fixup_singularity.log
+  echo "" >> /tmp/condor_10-fixup_singularity.log
+fi
+
+# Dirty hack for issue: https://github.com/sylabs/singularity/issues/3670
+if [ ! -e /dev/tty -a -e /dev/pts/0 ]; then
+  echo "symbolic links NOT properly defined for tty" >> /tmp/condor_10-fixup_singularity.log
+  echo "now defined by 10-fixup_singularity.sh" >> /tmp/condor_10-fixup_singularity.log
+  echo "" >> /tmp/condor_10-fixup_singularity.log
+  ln -s /dev/pts/0 /dev/tty
+else
+  echo "symbolic links properly defined for tty" >> /tmp/condor_10-fixup_singularity.log
+  echo "" >> /tmp/condor_10-fixup_singularity.log
+fi
+
+# If environment was destroyed, e.g. by changing interpreter (to "script"), fixup things.
+if [ -z "${HOME}" ]; then
+  echo "environment NOT properly defined" >> /tmp/condor_10-fixup_singularity.log
+  echo "now defined by 10-fixup_singularity.sh" >> /tmp/condor_10-fixup_singularity.log
+  echo "" >> /tmp/condor_10-fixup_singularity.log
+  export HOME=${SINGULARITY_HOME}
+  # Also do a TERM definition only here, only want to do that if we are in a known-broken environment.
+  export TERM="linux"
+else
+  echo "environment properly defined" >> /tmp/condor_10-fixup_singularity.log
+  echo "HOME = $HOME" >> /tmp/condor_10-fixup_singularity.log
+  echo "TERM = $TERM"  >> /tmp/condor_10-fixup_singularity.log
+  echo "" >> /tmp/condor_10-fixup_singularity.log
+fi
+
+# If TERM is dumb, also "upgrade" that to "linux". Seems to happen when using unprivileged sshd + nsenter.
+if [ "x${TERM}" = "xdumb" ]; then
+        echo "TERM NOT set to linux" >> /tmp/condor_10-fixup_singularity.log
+        echo "now set by 10-fixup_singularity.sh" >> /tmp/condor_10-fixup_singularity.log
+	echo "" >> /tmp/condor_10-fixup_singularity.log
+	export TERM="linux"
+fi
+
+# If LD_LIBRARY_PATH does not contain the Singularity specific bind mount target, add that.
+# Usually done in /.singularity.d/env/99-base.sh, but we might not have sourced that.
+if [ -d "/.singularity.d/libs" ] && [[ ":$LD_LIBRARY_PATH:" != *":/.singularity.d/libs:"* ]]; then
+  echo "Singularigy-specific bind mount target NOT included in LD_LIBRARY_PATH" >> /tmp/condor_10-fixup_singularity.log
+  echo "now included by 10-fixup_singularity.sh" >> /tmp/condor_10-fixup_singularity.log         
+  echo "" >> /tmp/condor_10-fixup_singularity.log
+  # Prepend only if not present yet, see https://superuser.com/a/39995/858025 .
+  LD_LIBRARY_PATH="/.singularity.d/libs${LD_LIBRARY_PATH:+":$LD_LIBRARY_PATH"}"
+else
+  echo "Singularigy-specific bind mount target already included in LD_LIBRARY_PATH" >> /tmp/condor_10-fixup_singularity.log
+  echo "" >> /tmp/condor_10-fixup_singularity.log
+fi
+
+# Singularity sets "C" locale in "-C" (i.e. full containment) mode. We prefer something with utf8.
+if [ -z "${LANG}" -o "x${LANG}" = "xC" ]; then
+  echo "LANG NOT set to en_US.utf8" >> /tmp/condor_10-fixup_singularity.log
+  echo "now set by 10-fixup_singularity.sh" >> /tmp/condor_10-fixup_singularity.log 
+  echo "" >> /tmp/condor_10-fixup_singularity.log
+  export LANG=en_US.utf8
+else
+  echo "LANG already set to en_US.utf8" >> /tmp/condor_10-fixup_singularity.log
+  echo "" >> /tmp/condor_10-fixup_singularity.log
+fi